add test__issue6.py

greentest/test__issue6.py

+import sys
+
+
+if not sys.argv[1:]:
+    from subprocess import Popen, PIPE
+    p = Popen([sys.executable, __file__, 'subprocess'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
+    out, err = p.communicate('hello world\n')
+    code = p.poll()
+    assert p.poll() == 0, (out, err, code)
+    assert out.strip() == '11 chars.', (out, err, code)
+    assert err == '', (out, err, code)
+
+elif sys.argv[1:] == ['subprocess']:
+    import gevent
+    import gevent.monkey
+    gevent.monkey.patch_all(sys=True)
+
+    def printline():
+        line = raw_input()
+        print '%s chars.' % len(line)
+
+    gevent.spawn(printline).join()
+
+else:
+    sys.exit('Invalid arguments: %r' % (sys.argv, ))